mauger



Patented Feb. 2|, |899. G. A. MAUGER. COMBINED TAMPING AND ROLLINGMACHINE.

(Application filed Apr. 2, 1898.!

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Nu INMU Ne. 6|9,977. .Y Patented Feb. 2|, |899. G. A. MAUGER.

CUMBINED TAMPING AND ROLLING MACHINE.

(Application filed Apr. 2, 1898.] Y ("0 Modem 2 sheets-sheet 2.

UNITED rSTATES PATENT OFFICE.

GEORGE A. MAUGER, OF KANSAS CITY, MISSOURI, ASSIGNOR OF ONE-HALF TOHENRY R. KASSON, OF SAME PLACE.

COMBINED TAMPING A ND ROLLING MACHINE.

SPECFIGATION forming part of Letters Patent No. 619,977, dated February21, 1899.

Application filed April 2, 1898. Serial No. 676,230. (No model.)

To all whom, it may concern:

Be it known that I, GEORGE A. MAUGER, of Kansas City, Jackson county,Missouri, have invented certain new and useful Improvements in aCombined Tamping and Rolling Machine, of which the following is aspecification.

My invention relates to combined tamping and rolling machines for layingasphalt pavements, and is designed more particularly as an improvementin a machine of similar character for which I made application for apatent on November 26, 1897, Serial No. 659,833, the general object inthis connection being to produce a machine of far simpler and morecompact construction and which is more reliable in operation.

The object of the invention is to produce a street-paving machine vwhichembodies in its construction a roller and a series of automatic tamperswhereby the asphalt may be packed sufficiently hard to prevent theroller as it rolls over such tamped surface from waving or undulatingthe surface of the street; and a further object is to produce a machineby which asphaltum paving may be facilitated v and the cost materiallyreduced.

In order that the invention may be fully understood, I will proceed todescribe it with reference to the accompanying drawings, in which-Figure 1 represents a top plan view of a combined rolling and tampingmachine embodying my invention, part of the same being a section ondotted lines I of Fig. 2. Fig. 2 is a vertical section taken on the lineIl II of Fig. 1. Fig. 3 is a plan view of a modified constructionhereinafter described.

In the said drawings, 1 designates the horizontal frame or bed of themachine, and 2 designates the roller for compressing the asphaltum andleveling its surface. Said roller, if the machine be newly built, willpreferably be located as shown but if the tamping mechanism be used asan attachment to the style of roller at present in use it will bepreferably secured at the front end of the machine, as will be readilyunderstood.

3 designates vertical standards at the front end of the frame or bed 1,and said standards may be braced or supported in any suitable orpreferred manner, and provided at their upper ends are bearings 4 forthe horizontal transverse shaft 5, which is preferably squared at itsends, as indicated by dotted lines in Fig. 2, to prevent rotatablemovement of said shaft.

A series of grooved guide-pulleys-in this instance five in number-arejournaled upon said shaft and are numbered 6 to 10, inclusive, andarranged between the same and between said bearings upon the shaft, soas to prevent lateral movement of the pulleys, are collars 11, securedrigidly by means of setscrews l2 by preference.

Bolted or otherwise secured to the standards 3, near their lower endsand arranged at their inner sides preferably, are plates 13, cast orotherwise formed with superposed bearings 14 of the usual construction,and secured in said bearings are parallel shafts 15, arranged in pairsand superposed with respect to each other. Journaled upon said shaftsand prevented from sliding thereon by any suitable means, such ascollars, (see Fig. 1,) are grooved antifriction-rollers 16 17, thegrooves of said rollers being squared in order that they may embracesnugly and prevent rotatable or twisting movement of the rectangularvertical stems 18 of a series of tampers numbered 19 to 23, inclusive,and of such configuration that they collectively form a rectangularfigure about equal in length to the roller 2, to the end that as themachine moves forward a path shall be made by said tampers in thefreshly-laid asphaltum, in which path the roller treads. These tampers,as before stated, collectively form a rectangular figure, butindividually are of substantially triangular form, in order that thetampers whose sides diverge rearwardly may, as the machine movesforwardly, tamp the surface represented by the joints between saidtampers and those whose sides diverge forwardly, so that no portion ofthe asphaltum shall remain untamped. To accomplish this, however, thetampers must be operated with sufficient rapidity to make two or morestrokes before the machine has traveled a distance equal to the width ofsaid rectangular figure-that is to say, equal to the width from front torear of a tamper.

24 designates a transverse shaft which is IOO journaled near itsopposite ends in bearings 25, secured to the frame or bed of themachine, and mounted upon one end of said shaft is a sprocket-wheel 26,adapted to be connected to the motor or driving mechanism, (not shown,)and upon the other end a sprocket-wheel 27, geared by a chain 28 (seedotted lines, Fig. l) to a larger sprocketwheel 29, upon one end of theshaft upon which the roller 2 is mounted.

30 designates a cross-bar which is preferably secured to the frame orbed rearward of shaft 24 and is provided with two cams or surfaces 3land 32, which extend eccentrically with respect to said shaft and areadapted when the machine is rotating forwardly or rearwardly,respectively, to perform the f unctions of a knock-off, whereby theraised or elevated tampers are permitted to fall and tamp the asphaltum,as will be hereinafter more particularly referred to.

33 to 37, inclusive, designate grooved rollers which are journaled uponthe shaft 24 and arranged in the same vertical planes, respectively, aspulleys 6 to 10, inclusive, and said rollers are provided withcylindrical hubs 38, provided peripherally with cavities 39, for apurpose which will presently be explained.

40 to 44, inclusive, designate sleeves or co1- lars which are keyed, asat 45, upon the shaft 24 and are provided with sockets 46, wherein tsnugly and rotatably the hubs 38 of said rollers. Said collars orsleeves are provided with radial holes 47, which register normally withthe sockets 39 of the wheel-hubs, and diametrically opposite said holeswith radially outward projecting guide-pins 48 and parallel passages 49,said passages being arranged at opposite sides of the shaft, as shownclearly in Fig. 2. Slidingly mounted upon said sleeves or collars areframes constructed as follows-that is to say, 50 designates a pair ofrods which extend through the passages 49 and are connected at one sideof the sleeve or collar by means of the cross-bar 5l, provided with therigid inwardly-projecting pin or dog 52, engaging the hole 47 andnormally the cavity 39 of the wheel-hub. The opposite ends of said rodare connected bya cross-bar 53, having a passage through which guidepin48 projects, and downwardly-projecting arms 54, between which arejournaled thel antifrictionroller 55, the latter being arranged adistance from the pin 48 slightly exceeding the depth of cavity 39 inorder that as the antifriction-roller rides upon cam 3l or cam 32 and isthereby pushed radially toward said shaft to cause the disengagement ofpin or dog 52 from said cavity 39, such movement shall not be interferedwith because of Contact between the inwardly-moving roller and therelatively-rigid pin 48, as will be readily understood. Immediately saidroller passes the crest of either cam-that is to say, the meeting-lineof said cams-the spring 5G, surrounding pin 4S and arranged between thesleeve or collar and cross-bar 53,

tends to return the roller to its original distance from the axis of thesleeve or collar. This movement, however, is successfully opposed,because at this time pin or dog 52 is sliding upon the periphery of thewheel-hub 38; but this opposition is removed as the pin or dog andcavity reregister, when immediately the expansive power of spring 5Gadjusts said frame and causes said pin or dog to enter said cavity andlock the wheel to the sleeve or collar.

Each wheel is preferably provided near its periphery with a pin 57 forthe convenient attachment of the iiexible connections, consisting of thecables 58 59, retractile springs 60, turnbuckles 61, and screws 62, andthe front or lower ends of these connections are secured to loops oreyes of and at the upper ends of the tamper-stems. (See Fig. 2.) By thisconstruction with each revolution of said wheels the tampers areelevated to the position occupied by tamper 19, Fig. 2, from which pointas the knock-off or cam-bar trips the springactuated locking-'frame andreleases the roller it gravitates with but little frictional resistanceand strikes the asphaltum a blow of about four hundred pounds, more orless, the force of course depending on the height from which it drops,its weight, and the friction it has to overcome.

As the tamper is released it will slightly expand its spring 60, andsaid spring, the instant the overpowering force of the descending tamperis removed by the contact of the latter with the asphaltum, retraets andsupports the tamper slightly above the surface of the asphaltum to theend that the continuous forward movement of the machine may not causesaid tamper to plow up the asphaltum, as will be readily understood. Itis supported in such position, however, only momentarily, because themachine is geared to work with such rapidity that only an imperceptibletime elapses between the stroke of the tamper and the rengagement of thepin or dog 52 with the cavity 39 of its respective wheel-hub, whichrengagement of course causes the tamper to be again elevated, it beingunderstood, of course, that the reengagement is facilitated because thecollar or sleeve rotates continuously in the same direction, while thewheel after making a half-revolution is tripped and rotates back againto aboutits original position with great rapidity, caused bythe fall ofthe tamper, where it is immediately after rengaged by said pin or dog.As shown, the machine is presumed to be running backward, and the shafttherefore rotating in the direction indicated by the arrow, Fig. 2. Whenthe machine advances,

the shaft rotates in the opposite direction.

If it be desired at any time to throw the tampers out of gear with thedriving-shaft 24 without interfering with the travel of the machine, itis only necessary to disengage from the clutch 63, formed with orsecured to sprocket-wheel 26, the sliding rotatable IOO IIO

clutch 64, the latter being keyed to slide upon the shaft 24 in thecustomary manner and adapted to be disengaged from clutch 63 by thecustomary lever 65 in opposition to lthe spring 66, interposed betweenthe sliding member of the clutch and the collar 67, secured upon theshaft.

Fig. 3 illustrates a modified form of mechanism for raising the tampersat the proper time and releasing them when they have attained the properelevation. This mechanism embodies the grooved wheels, corresponding inconstruction, location, and function to the grooved wheels 33 to 37,inclusive, except that the hubs of these wheels are in the form ofV-tooth clutch members 68. In this case also in lieu of the sleeves orcollars 40 to 44., inclusive, and the sliding frames carried thereby Iemploy clutch members 69, keyed to rotate with and slide upon the shaftand provided with V-shaped arms or dogs 70, said members 69 being heldwith a yielding pressure in engagement with clutch members 68 by springs7l', bearing against collars 72, secured upon the shaft by set-screws 73or equivalent means. In lieu of the cross-bar 30, provided withcam-faces, I employ a cross-bar 30a, provided with antifriction-rollers74, arranged in the path of the V-shaped arms 70, so that with eachrevolution of the shaft when rotating in either direction said arms 70will come in contact with the relatively-immovable rollers 74, whichovercome the pressure of springs 71 and, disengaging clutch members 68and 69, permit the tampers, connected, as shown in Figs. 1 and 2, tosaid wheels, to drop and perform their tamping function, as will bereadily understood. This modified form of construction is much.. simplerthan that illustrated in Figs. 1 and'2; but as the springs 71 are allmounted upon the shaft it would require the removal of the power-shaf tfrom its bearings each time it became necessary to replace one of saidsprings. In the preferred type of construction a repair necessitating anew spring 56 may be easily and quickly made without disturbing theshaft by simply removing the cross-bar 53 from the ends of rods 50. 0fcourse it is possible to hold the clutch members 69 in engagement withclutch members 68 of the modified form without mountingthe-actuating-springs or their equivalents upon the shaft, but thearrangement shown is believed to be the simplest and most practical wayof accomplishing the result desired.

The sleeves or collars are keyed. upon the power-shaft in differentrelative positions in order to permit only a single tamper to drop at atime, thereby more equally distributing the strain upon the machine byobviating the necessity of lifting all of the tampers at once.Furthermore, the tamping` operation may be more uniformly andeffectually performed by permitting the tampers to descendalternately--that is to say, it is desirablethat the sleeves or collarsbe so arranged that all of the tampers shall drop as each fifth of arevolution of the shaft is completed, thereby making uniform theinterval of time between strokes. In the drawings the positions of thetampers and the connected parts presuppose the tamper 20 rising from theimpact with the asphaltum, tamper 19 beginning to fall, tampers 21 and22 on their downstroke, and tamper 23 coming up, but, as above stated,this matter is entirely optional with the engineer in charge of themachine.

While the foregoing description relates to the machine as a tamper forstreet-pavements, it is of course obvious that the mechanism for raisingthe tampers to a certain height and then tripping them will be found ofexceptional advantage in a stamping-mill for crushing ore. Therefore Ido not wish to confine myself to its use in any particular connection,but claim, broadly, the mechanism for operating the tampers either inconnection with a roller or independent of the same, and it is to beunderstood that I reserve the right to make all changes which do notinvolve a departure from the spirit and scope or sacrifice any of theadvantages of the invention.

Having thus described the invention, what I claim as new, and desire tosecure by Letters Patent, is*

1. The combination of a reciprocatory tamper, a power-shaft, a wheelmounted upon the power-shaft and rotating with the same, an expansiveconnection between the tamper and the wheel, and means to free saidwheel from the power of said shaft, and thereby permit the tamper tomake its power-stroke, substantially as described.

2. In a combined tamping and rolling machine, a reciprocatory tamper, adriven shaft, a wheel mounted upon said shaft, and a ilexible expansiveconnection between said wheel and said tamper, substantially asdescribed.

3. In a combined tamping and rolling machine, a reciprocatory tamper, adriven shaft, a wheel mounted upon said shaft, a flexible expansiveconnection between said wheel and said tamper, means for varying thelength of said flexible connection, and means to free the wheel from thepower of said shaft, substantially as described.

4. In a combined tamping and rolling machine, a reciprocatory tamper, adriven shaft, a wheel journaled thereon and connected to the tamper, asleeve or collar keyed upon said shaft, a spring-actuated frame carriedby said sleeve or collar and engaging said wheel to cause the latter torotate with the former, and means to repress said spring-actuated frameand thereby disengage said sleeve or collar and the wheel, substantiallyas described.

5. A. combined tamping and rolling machine, comprising a reciprocatorytamper, a driven shaft, a wheel journaled thereon, a flexible connectionbetween the tamper and said wheel, a sleeve or collar upon the shaft, aspring-actuated frame carried thereby and ICO IIO

engaging said wheel, and means to repress said frame and disengage saidsleeve or collar and the wheel, substantially as described.

6. A combined tamping and rolling machine, comprising a reciprocatorytamper, a driven shaft, a wheel journaled thereon, a flexible connectionbetween the tamper and said wheel, embodying a retractile spring, asleeve or collar upon the shaft, a spring-actuated frame carried therebyand engaging said wheel, and means to repress said frame and disengagesaid collar and wheel, substantially as described.

7. In a combined tamping and rolling machine, a reciprocatory tamper, adriven shait, a wheel journaled thereon, and connected to the tamper, asleeve orcollar keyed upon said shaft, aspring-actuated frame carriedbysaid sleeve or collar and engaging said wheel to cause the latter torotate with the former, means to repress said spring-actuated frame andthereby disengage said sleeve or collar and the Wheel, and a knock-offhaving cam-faces to adjust said frame in opposition to itsactuating-spring, and thereby free the wheel from the sleeve or collar,substantially as described.

8. In a combined tamping and rolling machine, a reeiprocatory tamper,adriven shaft, a wheel journaled thereon, and connected to the tamper, asleeve or collar keyed upon the shaft, a spring-actuated frame carriedby said sleeve or collar and engaging said wheel to cause the latter torotate with the former, means to repress said spring-actuated frame andthereby disengage said sleeve or collar and the wheel, and a knock-offhaving a double cam-face to adj ust said frame in opposition to itsactuating-spring, and thereby free the wheel from the sleeve or collar,substan-V tially as described.

9. In a combined tamping and rolling machine, a reciprocatory tamper, adriven shaft, a Wheel journaled thereon, a connection be tween the wheeland the tamper, a sleeve or collar keyed upon said shaft, a slidingframe carried by said sleeve or collar and provided with a pin or dog,an antifrictionmoller, a spring for causing said pin or dog to interlockwith the hub of said wheel, and a knock-olf bar having cam-faces toengage said roller and canse the disengagement of said pin or dog withthe hub of said wheel, substantially as described.

10. In a combined tampiug and rolling machine, a suitable frame,provided with a roller, for compressing and leveling asphaltum,vertically-arranged series of guide-rollers, guidepulleys, a drivenshaft, wheels journaled thereon, a series of reciprocatory tampershaving their stems `guided between said series of rollers, iexibleconnections guided over said pulleys and attached at their lower ends tothe tamper-stems and at their opposite ends to the peripheries of saidwheels so as to wind thereon, means to lock said wheels upon said shaft,and means to free them from the power of said shaft, substantially asand for the purpose set forth.

In testimony whereof I affix my signature in the presence of twowitnesses.

GEORGE A. MAUGER.

Witnesses:

J. L. HANK, L. H. CHENET.

